JPS5621210A - Power failure backup unit - Google Patents
Power failure backup unitInfo
- Publication number
- JPS5621210A JPS5621210A JP9595579A JP9595579A JPS5621210A JP S5621210 A JPS5621210 A JP S5621210A JP 9595579 A JP9595579 A JP 9595579A JP 9595579 A JP9595579 A JP 9595579A JP S5621210 A JPS5621210 A JP S5621210A
- Authority
- JP
- Japan
- Prior art keywords
- power
- output
- power supply
- routine
- power failure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Power Sources (AREA)
- Stand-By Power Supply Arrangements (AREA)
- Safety Devices In Control Systems (AREA)
Abstract
PURPOSE: To back up the power supply with low power consumption without losing substantial functial fuction of unit, by performing the backup of power supply through the detection of power failure of AC power input and cutting off all the output port signals having much power consumption at the same time.
CONSTITUTION: If the AC power input 2 is in failure, the power supply backup circuit 8 draws power supply from the battery 7, and supplies power to the microcomputer control section 12 through the constant voltage circuit 10. Simultaneously, at the control section 12, the power failure deciding routine C decides the adsence of AC waveform at the input port 22 checked at the check routine B and detects the power failure, and in this case, the output to the 1st output port 26 to the digital display section 16 comparatively much in the power consumption in the output limit routine is inhibited and the output limit routine f inhibits the output to the 3rd output port 30 to the control output section 20.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9595579A JPS5621210A (en) | 1979-07-27 | 1979-07-27 | Power failure backup unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9595579A JPS5621210A (en) | 1979-07-27 | 1979-07-27 | Power failure backup unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5621210A true JPS5621210A (en) | 1981-02-27 |
Family
ID=14151660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9595579A Pending JPS5621210A (en) | 1979-07-27 | 1979-07-27 | Power failure backup unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5621210A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5822407A (en) * | 1981-08-04 | 1983-02-09 | Toshiba Corp | Microcomputer for automobile |
JPS61294529A (en) * | 1985-06-21 | 1986-12-25 | Nippon Carbureter Co Ltd | Electronic controller |
JPS63266511A (en) * | 1987-04-24 | 1988-11-02 | Hitachi Ltd | Power source control system |
JPH0426336A (en) * | 1990-05-17 | 1992-01-29 | Fujitsu Ltd | Backup control circuit |
EP0562538A2 (en) * | 1992-03-26 | 1993-09-29 | Matsushita Electric Industrial Co., Ltd. | Gas burning apparatus |
-
1979
- 1979-07-27 JP JP9595579A patent/JPS5621210A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5822407A (en) * | 1981-08-04 | 1983-02-09 | Toshiba Corp | Microcomputer for automobile |
JPS61294529A (en) * | 1985-06-21 | 1986-12-25 | Nippon Carbureter Co Ltd | Electronic controller |
JPS63266511A (en) * | 1987-04-24 | 1988-11-02 | Hitachi Ltd | Power source control system |
JPH0426336A (en) * | 1990-05-17 | 1992-01-29 | Fujitsu Ltd | Backup control circuit |
EP0562538A2 (en) * | 1992-03-26 | 1993-09-29 | Matsushita Electric Industrial Co., Ltd. | Gas burning apparatus |
US5429111A (en) * | 1992-03-26 | 1995-07-04 | Matsushita Electric Industrial Co., Ltd. | Gas burning apparatus |
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